* Bug #974632: _ConnectionDeadError sometimes was escaping the get/set
code. This should return to readline() not raising an exception, except
in the case that it's called from the get/set(). Report from Gary
Poster, proposed patch by Brad Crittenden.

Misc fixes by Brad Crittenden: fixing a docstring, if "port" is set to
any false-like value it will default to 11211.